DTC C1A4B: Stop Light Relay Circuit [08/2015 - ]: Description
The skid control ECU (brake actuator assembly) sends a stop light operation signal to the stop light control relay (STOP relay).
When the skid control ECU (brake actuator assembly) detects a malfunction in the stop light circuit, the driving support ECU assembly stores DTC C1A4B.
| DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
| C1A4B |
Stop Light Relay Circuit |
Either of the following conditions is met:
- When the engine switch is on (IG), the IG1 terminal voltage is between 11 and 14 V and the stop light illumination output signal (STPO) is output, the signal is not received at terminal STP2 for 0.3 seconds or more.
- When the engine switch is on (IG), the IG1 terminal voltage is between 11 and 14 V and the stop light illumination output signal (STPO) is not output, the signals received at terminals STP and STP2 are different for 0.3 seconds or more.
|
- Lighting system
- Vehicle stability control system
- Wire harness or connector
- STOP relay
- Driving support ECU assembly
|